1. Customary and metric conversions
Using stoichiometry
8/21/2017

2. Customary units of length
1ft 12 in (1x12)=12 in
1 ft
3ft 12in (3x12/1)=36in
1ft
1 ft= 12 in
1yd= 3 ft
1 mile = 5,280 ft OR 1,760 yd
The unit/measurement we are converting
Multiply across
Divide the bottom number
The ratio
(there are 12 in in 1 ft)

3. Lets practice stoichiometry…
72 inches to feet
33 feet to yards
25 feet to inches
72 in 1ft 6 feet
12in
33 ft 1yd 11 yds
3 ft
25 ft 12 in 300 inches
1 ft
72-12=60
60-12=48
48-12=36
36-12=24
24-12=12
12-12=0
33/11=3
**if it does not come out to a whole number, use repeated subtraction to get a mixed #.
25x12=300 inches

4. Customary units of Mass
1lb 16 oz (1x16)=16oz
1 lb
48oz 1 lb 3 lbs
16 oz
1 lb= 16 oz
1 ton= 2,000 lbs
48-16= 32
32-16=16
16-16=0
Division is repeated subtraction.
The unit/measurement we are converting
The ratio
(there are 16 oz in 1 lb)

5. Lets practice stoichiometry…
24oz to lb
3 lb to oz
3000 lb to tons
24 oz 1 lb 1 ½ lb
16 oz
3lb 16oz 48 oz
1 lb
3000lb 1 ton 1 ½ tons
2000 lb
24-16=8
1 lb with 8 oz left over
33/11=3
**if it does not come out to a whole number, use repeated subtraction to get a mixed #.
=1000
1000= ½ ton

6. Customary units of Volume
10c 8floz (10x8)=80 floz
1 c
9 qt 1 g 2 ¼ g
4 qt
1cup= 8 fluid oz
1pint= 2c=16 floz
1qt=2 pint=4 cups =36floz
1g= 4 qt=8 pt=16 c= 128 floz
9-4=5
5-4=1
One quart left over
Division is repeated subtraction.
The unit/measurement we are converting
The ratio
(there are 4 qts in 1 gallon)

7. Lets practice stoichiometry…
17 cups to pints
2 g to quarts
35 floz to cups
17 c 1 p 8 ½ p
2 c
2 g 4qt 8qt
1 g
35floz 1 c 4 3/8 c
8floz
17/2= NOT A WHOLE NUMBER…
17-1=16
16/2= CUP